• fix: $&, $`, $' and $$ inside a nested value ($t(key)) now stay literal. nest() handed the resolved value straight to String.replace as the replacement argument, so those sequences were read as replacement patterns: $& re-inserted the $t(...) match, $` / $' inserted the text before / after it, and $$ collapsed to $. Through t() the $& case was worse than a wrong string: the nested lookup resets the shared nesting regexp, so the re-inserted $t(...) was matched again on every pass and t() never returned — also under the default escapeValue: true when the value arrives via a variable forwarded through nesting options ($t(key, { "name": "{{name}}" }) with a name containing $&). The value is now $-escaped at the String.replace call, the same guard interpolate() already has, and a non-string value returned by a formatter in the nesting chain ($t(key, myFormat)) is stringified before that. Nested values are still not HTML-escaped (#854). Thanks @mahirhir (#2447).